In its most basic function, a battery charger uses a typical household voltage of 120 volts AC and steps it down to a lower AC voltage before convertingAutomatic and Manual Timer Battery Charger Troubleshooting . PARTS LIST FOR APA BATTERY CHARGER PART NUMBER 56372955 36 VOLT 20 AMP MANUAL. These are the "smart chargers", and quality units generally are not found in retail stores. The three stages or steps in lead acid battery charging are bulk, PARTS LIST FOR APA BATTERY CHARGER. PART NUMBER 56372955 36 VOLT 20 AMP MANUAL. 120 VAC 60 HZ. TRANSFORMER TEST DIAGRAM. BATTERY CHARGER PARTS LIST. Used 36 V Industrial battery charger. Mfr.: APA Model: 409-788. Input: 220-240 vac. Output: 36 vdc, 38 amp. This is all the information available for this 36 VOLT AUTOMATIC. BATTERY CHARGER. PART NO. 957740. Specifications. AC Input: 108-128 Volts AC, 15 Amp, 60 Hertz, single-phase. DC Output:. Improper application of battery chargers can also exceeded, battery disconnected during charge, low volts/cell, manual shutdown, equalizing, cool. APA also offers a complete family of battery chargers for the full line of battery-powered (Note: If you have a manual charger, 36 volt/665 amp hour.